Annual Picnic and Celebration of Roshi's 20th Year as a Teacher   As usual, the table for the pot-luck was groaning with delicious vegetarian grub. A huge crowd came to the picnic to honor Roshi, and to enjoy the day.     To celebrate Roshi's twentieth year as a teacher, we had a gorgeous (and delicious) three-level cake     Roshi, in his usual good-sported way, submitting to surprises, speeches, and....cake.     After the picnic, the games. Even though it was hot enough to boil those eggs, everyone wanted a chance to test their skills.           Everyone getting ready for the three-legged race.           Meanwhile, behind the retreat center, the Zendo Project takes shape.     The day before the picnic we had a heavy rain. Sangha member, Milo, makes the best of what the rain left in the new zendo foundation.     Sangha member, Aiko, and his koan demonstration.